Turning and stacking type high-speed cutting and stacking all-in-one machine and production process thereof

Abstract

The invention relates to the technical field of batteries, and discloses a rotary stacking type high-speed cutting and stacking all-in-one machine and a production process thereof.The rotary stacking type high-speed cutting and stacking all-in-one machine comprises a cabinet, and the cabinet is internally provided with an unwinding mechanism used for unwinding a positive plate coiled material and a negative plate coiled material; the negative electrode film sealing mechanism is used for rotationally cutting the negative electrode plate and forming a negative electrode plate I, and then heat-sealing diaphragms on two sides of the negative electrode plate I; the rotary cutting mechanism is used for carrying out rotary cutting on the positive plate to form a positive plate I and carrying out hot cutting on the diaphragm to form a negative plate II; the lamination mechanism is used for alternately conveying and stacking the positive plate I and the negative plate II; and the rotary rubberizing assembly is used for carrying out rubberizing treatment on the stacked positive electrode plate I and negative electrode plate II. According to the invention, the negative electrode film sealing process is added, the lamination process is improved, and the reciprocating motion of translating the positive electrode plate and the negative electrode plate is canceled, so that the conveying among the materials is more coherent, the production efficiency is higher, and the percent of pass is higher.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, in particular to a rotating high-speed stacking and cutting machine and a production process thereof. Background Art

[0002] Lithium batteries have the advantages of high voltage, high energy density, high safety, and low self-discharge rate. With the further development of science and technology, people's demand for lithium batteries is increasing. In the process of lithium battery production, the speed of cutting and stacking directly determines the production capacity of the entire production line and the cost of battery cell manufacturing.

[0003] The lamination process used in the traditional method is as follows: Unwinding, unfolding the positive electrode sheet, negative electrode sheet and separator from the coil separately; cutting, first use a cutting machine to cut the positive electrode sheet, negative electrode sheet and separator separately; stacking, stacking the positive electrode sheet, negative electrode sheet and separator by a stacking machine, and the separator is located between the positive and negative electrode sheets to play an insulating role; gluing, sealing the whole with glue to form a finished battery cell; the stacking method is completed by multiple reciprocating and translational robotic arms in conjunction with a vacuum adsorption platform and a conveyor. The movement frequency is limited, resulting in low production capacity.

[0004] The existing technology integrates a cutting machine and a stacking machine to form a high-speed cutting and stacking machine, which shortens the transportation distance of each component and adopts a Z-shaped stacking process. The diaphragm is continuously supported in a Z shape, and the cut positive and negative electrodes are placed in turn on both sides to achieve the purpose of increasing the stacking speed. Although the production efficiency is improved, since the diaphragm is pulled back and forth into a Z shape, the tension on the diaphragm is prone to be too large, which will cause the two sides of the diaphragm to become narrower. After the diaphragm is sandwiched between the electrodes, the sides of the electrodes are exposed to the outside, causing the negative electrode of the battery to contact the positive electrode, making the manufactured battery cell prone to short circuit and reducing the qualified rate. In addition, the positive and negative electrodes are still stacked by translational conveying, and there is still room for further improvement in production capacity.

[0005] Therefore, in order to solve the above problems, a folding high-speed cutting and folding machine and a production process thereof are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a rotating high-speed cutting and stacking machine and its production process, which can greatly improve production efficiency by adding a negative electrode sealing process and an improved stacking process to replace the translational stacking method, thereby solving the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: On the one hand, a high-speed stacking and cutting machine is provided, comprising a cabinet, wherein the cabinet is internally installed with: An unwinding mechanism, the unwinding mechanism is located on both sides of the cabinet, and the unwinding mechanism is used to unwind the positive electrode sheet coil and the negative electrode sheet coil respectively; A negative electrode film sealing mechanism, which is located on one side of the cabinet near the negative electrode sheet coil, and is used to peel the negative electrode sheet and form a negative electrode sheet I, and then heat-seal the negative electrode sheet I with two-sided diaphragms; A rotary cutting mechanism, the rotary cutting mechanism is located in the middle of the cabinet, and is used to rotary cut the positive electrode sheet to form the positive electrode sheet I, and to hot cut the diaphragm to form the negative electrode sheet II; A laminating mechanism, the laminating mechanism is located below the rotary cutting mechanism, and is used for alternately conveying and stacking the positive electrode sheet I and the negative electrode sheet II; The rotating glue sticking assembly is located below the stacking mechanism and is used to seal the stacked positive electrode sheet I and negative electrode sheet II with glue.

[0008] Specifically, the unwinding mechanism includes a positive electrode sheet unwinding assembly and a negative electrode sheet unwinding assembly installed inside the cabinet, the positive electrode sheet unwinding assembly is located on the left side of the cabinet, and the negative electrode sheet unwinding assembly is located on the right side of the cabinet; the positive electrode sheet unwinding assembly is used to unwind the positive electrode sheet coil, and the negative electrode sheet unwinding assembly is used to unwind the negative electrode sheet coil. A tension control mechanism, a defect detection mechanism and a fine-tuning corrector are arranged in the direction of conveying the positive electrode sheet and the negative electrode sheet toward the middle. The defect detection mechanism, the fine-tuning corrector and the tension control mechanism are used to correct the lateral errors of the positive electrode sheet and the negative electrode sheet during the conveying process to ensure accurate transmission.

[0009] Specifically, the negative electrode film sealing mechanism includes a diaphragm unwinding assembly and a diaphragm heat sealing mechanism installed inside the cabinet. The diaphragm heat sealing mechanism is located on the right side inside the cabinet. The number of the diaphragm unwinding assemblies is two and they are distributed on the upper and lower sides of the diaphragm heat sealing mechanism. The diaphragm unwinding assembly is used to unwind the diaphragm coil. The diaphragm and negative electrode sheet transported by the diaphragm unwinding assemblies on both sides can enter the diaphragm heat sealing mechanism at the same time. The diaphragm heat sealing mechanism is used to first rotary cut the negative electrode sheet into negative electrode sheet I, and then heat seal the negative electrode sheet I between the diaphragms on the upper and lower sides.

[0010] Furthermore, the membrane heat sealing mechanism includes a heat sealing roller and a negative electrode rotary cutting roller. The negative electrode rotary cutting roller is used to complete the rotary cutting of the negative electrode tabs, positioning holes, R angles and cutting during the transportation of the negative electrode sheet, while the heat sealing roller is used to heat the membranes on both sides.

[0011] Specifically, the rotary cutting mechanism includes a positive electrode rotary cutting assembly and a negative electrode hot cutting assembly. The positive electrode rotary cutting assembly is located on the left side of the negative electrode hot cutting assembly. The positive electrode rotary cutting assembly is used to rotary cut the positive electrode sheet and form a positive electrode sheet I. The negative electrode hot cutting assembly is used to rotary hot cut the diaphragm coated on the negative electrode sheet I and form a negative electrode sheet II.

[0012] Furthermore, the positive electrode rotary cutting assembly includes a positive electrode rotary cutting roller, which is used to complete the rotary cutting of the positive electrode ears, positioning holes, R angles and cutting during the transportation of the positive electrode sheets; the negative electrode hot cutting assembly includes a hot cutting roller, which is used to cut the diaphragm.

[0013] Specifically, the stacking mechanism includes a vacuum belt conveyor and a detection and storage platform. The detection and storage platform is located below the vacuum belt conveyor. The vacuum belt conveyor is used to convey the positive electrode sheets I and the negative electrode sheets II alternately arranged on the upper side, and stack the positive electrode sheets I and the negative electrode sheets II alternately in the detection and storage platform on the lower side.

[0014] Specifically, the rotating glue sticking assembly includes a glue sealing machine, which is used to perform glue sealing on the positive electrode sheets I and negative electrode sheets II that have reached a certain number in the detection and storage platform to form a battery cell.

[0015] Furthermore, a dust sweeping box is installed inside the cabinet, and the dust sweeping box is respectively located above the positive electrode sheet unwinding assembly and the negative electrode sheet unwinding assembly, and the dust sweeping box is used to absorb debris on the positive electrode sheet and the negative electrode sheet.

[0016] On the other hand, the production process of the rotating high-speed cutting and stacking machine is provided, including Unwinding process: the positive electrode sheet coil, the negative electrode sheet coil and the separator coils on the upper and lower sides are unwound to form the positive electrode sheet, the negative electrode sheet and the separators on the upper and lower sides; Negative electrode sealing process: the negative electrode sheet is peeled to form negative electrode sheet I, and negative electrode sheet I is heat-sealed in the separators on the upper and lower sides; Peeling process: The positive electrode sheet is peeled to form positive electrode sheet I, and the negative electrode sheet I heat-sealed in the separator is separated by heat cutting to form negative electrode sheet II; Stacking process: positive electrode sheets I and negative electrode sheets II are transported alternately and stacked to form a preliminary battery cell; Gluing process: glue the preliminary battery cells to completely seal them and form the finished battery cells.

[0017] Compared with the prior art, the present invention has the following beneficial effects: A negative electrode sealing process has been added, in which the rotary cut negative electrode sheet I can be continuously heat-sealed in the upper and lower sides of the diaphragms, and then hot-cut into negative electrode sheet II by the negative electrode hot cutting assembly; the negative electrode sheet II and the rotary cut positive electrode sheet I are alternately stacked and stored through the improved stacking process to form a preliminary battery cell, which is then sealed with glue to form a finished battery cell; compared with the existing Z-shaped stacking process, the reciprocating movement of the positive and negative electrode sheets is cancelled, and under the premise of ensuring that the electrode sheets can be completely insulated and isolated, the transportation between the materials is more consistent, and the production efficiency is higher and the qualified rate is higher.

[0018] In addition, the integrated structure is more three-dimensional, compact and reasonable, further reducing the footprint of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure inside the cabinet of the present invention.

[0020] In the figure: 1 cabinet, 2 unwinding mechanism, 21 positive electrode unwinding assembly, 22 negative electrode unwinding assembly, 3 fine-tuning corrector, 4 defect detection mechanism, 5 tension control mechanism, 6 negative electrode sealing mechanism, 61 diaphragm unwinding assembly, 62 diaphragm heat sealing mechanism, 7 rotary cutting mechanism, 71 positive electrode rotary cutting assembly, 72 negative electrode heat cutting assembly, 8 stacking mechanism, 81 vacuum belt conveyor, 82 detection and storage platform, 9 rotary gluing assembly, 10 dust sweeping box. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Positive electrode sheet: a sheet material unwound from the positive electrode sheet coil. Figure 1 Indicated by dotted line; Positive electrode sheet I: a positive electrode sheet formed by rotary cutting; Negative electrode sheet: a sheet material unwound from the negative electrode sheet coil. Figure 1 Indicated by dot-dash lines; Negative electrode sheet I: a rotary cut negative electrode sheet; Negative electrode sheet II: Negative electrode sheet I is formed by heat sealing and cutting of the diaphragm; Diaphragm: It is a sheet material unrolled from the diaphragm roll. Figure 1 Indicated by double dotted line.

[0023] See also Figure 1The present invention provides a rotating and folding high-speed cutting and stacking machine, including a cabinet 1. The cabinet 1 is an existing device composed of a cabinet body and a hinged transparent cabinet door, which plays a role of isolating and protecting internal components. A reeling mechanism 2, a negative electrode sealing mechanism 6, a rotary cutting mechanism 7, a laminating mechanism 8 and a rotary gluing component 9 are installed inside the cabinet 1.

[0024] Specifically, the unwinding mechanism 2 is located on both sides of the cabinet 1, and is used to unwind the positive electrode sheet coil and the negative electrode sheet coil respectively, and the positive electrode sheet coil is located on the left and the negative electrode sheet coil is located on the right; the negative electrode film sealing mechanism 6 is located on the side of the cabinet 1 close to the negative electrode sheet coil, and is used to rotary cut the negative electrode sheet and form the negative electrode sheet I, and then heat-seal the negative electrode sheet I on both sides with the diaphragm; the rotary cutting mechanism 7 is located in the middle of the cabinet 1, and is used to rotary cut the positive electrode sheet and form the positive electrode sheet I, and heat-cut the diaphragm to form the negative electrode sheet II; the stacking mechanism 8 is located below the rotary cutting mechanism 7, and is used to alternately convey and stack the positive electrode sheet I and the negative electrode sheet II; the rotary gluing assembly 9 is located below the laminating mechanism 8, and is used to seal the stacked positive electrode sheet I and the negative electrode sheet II with glue.

[0025] Specifically, the unwinding mechanism 2 includes a positive electrode sheet unwinding assembly 21 and a negative electrode sheet unwinding assembly 22 installed inside the cabinet 1, the positive electrode sheet unwinding assembly 21 is located on the left side of the cabinet 1, and the negative electrode sheet unwinding assembly 22 is located on the right side of the cabinet 1; the positive electrode sheet unwinding assembly 21 is used to unwind the positive electrode sheet coil, and the negative electrode sheet unwinding assembly 22 is used to unwind the negative electrode sheet coil, and a tension control mechanism 5, a defect detection mechanism 4 and a fine-tuning corrector 3 are arranged in the direction of conveying the positive electrode sheet and the negative electrode sheet to the middle; the tension control mechanism 5, the defect detection mechanism 4 and the fine-tuning corrector 3 are existing equipment, and the defect detection mechanism 4, the fine-tuning corrector 3 and the tension control mechanism 5 are used to correct the side errors of the positive electrode sheet and the negative electrode sheet during the conveying process to ensure accurate transmission.

[0026] Furthermore, the defect detection mechanism 4 detects the electrode sheets through the CCD visual component, and while having the conveying detection function, it can also ensure that the positive electrode sheets and negative electrode sheets conveyed are qualified products.

[0027] Furthermore, a dust sweeping box 10 is installed inside the cabinet 1, and the dust sweeping box 10 is respectively located above the positive electrode sheet unwinding assembly 21 and the negative electrode sheet unwinding assembly 22; the dust sweeping box is an existing equipment, and the dust sweeping box 10 is used to absorb debris (such as iron filings and dust) on the positive electrode sheet and the negative electrode sheet to ensure the cleanliness of the positive electrode sheet and the negative electrode sheet to avoid affecting subsequent processing.

[0028] Specifically, the negative electrode film sealing mechanism 6 includes a diaphragm unwinding assembly 61 and a diaphragm heat sealing mechanism 62 installed inside the cabinet 1. The diaphragm heat sealing mechanism 62 is located on the right side inside the cabinet 1. There are two diaphragm unwinding assemblies 61 and they are distributed on the upper and lower sides of the diaphragm heat sealing mechanism 62. The diaphragm unwinding assembly 61 is used to unwind the diaphragm coil. The diaphragm and negative electrode sheet transported by the diaphragm unwinding assemblies 61 on both sides can enter the diaphragm heat sealing mechanism 62 at the same time. The diaphragm heat sealing mechanism 62 is used to first rotary cut the negative electrode sheet into negative electrode sheet I, and then heat seal the negative electrode sheet I between the diaphragms on the upper and lower sides, so that each negative electrode sheet I is completely sealed and covered by the diaphragm on all sides.

[0029] Furthermore, the diaphragm heat sealing mechanism 62 includes a heat sealing roller and a negative electrode rotary cutting roller. The negative electrode rotary cutting roller is used to complete the rotary cutting of the negative electrode tabs, positioning holes, R angles and cutting during the transportation of the negative electrode sheet, while the heat sealing roller is used to heat the diaphragms on both sides to complete the heat sealing of the negative electrode sheet I.

[0030] Specifically, the rotary cutting mechanism 7 includes a positive electrode rotary cutting component 71 and a negative electrode hot cutting component 72. The positive electrode rotary cutting component 71 is located on the left side of the negative electrode hot cutting component 72. The positive electrode rotary cutting component 71 is used to rotary cut the positive electrode sheet and form a positive electrode sheet I. The negative electrode hot cutting component 72 is used to rotary hot cut the diaphragm coated on the negative electrode sheet I and form a negative electrode sheet II.

[0031] Furthermore, the positive electrode rotary cutting assembly 71 includes a positive electrode rotary cutting roller, which is used to complete the rotary cutting of the positive electrode ears, positioning holes, R angles and cutting during the transportation of the positive electrode sheets; the negative electrode hot cutting assembly 72 includes a hot cutting roller, which is used to cut the diaphragm.

[0032] Specifically, the stacking mechanism 8 includes a vacuum belt conveyor 81 and a detection and storage platform 82. The detection and storage platform 82 is located below the vacuum belt conveyor 81. The vacuum belt conveyor 81 is used to convey the positive electrode sheets I and the negative electrode sheets II that are alternately arranged on the upper side, and stack the positive electrode sheets I and the negative electrode sheets II alternately in the detection and storage platform 82 on the lower side. The vacuum belt conveyor 81 is an existing conveying equipment with a vacuum adsorption platform, which can accurately convey the positive electrode sheets I and the negative electrode sheets II from the upper side to the lower side and put them into the detection and storage platform 82. The detection and storage platform 82 has a detection probe, which is plugged and assembled with the positioning hole on the electrode sheet. Short circuit detection can be performed while storing the stacked positive electrode sheets I and negative electrode sheets II.

[0033] Specifically, the rotating glue sticking assembly 9 includes a glue sealing machine, which is an existing device. The glue sealing machine is used to perform glue sealing on the positive electrode sheets I and negative electrode sheets II that have reached a certain number in the detection and storage platform to form a battery cell.

[0034] In addition, a plurality of traction rollers may be installed on the cabinet 1 along the conveying direction of the positive electrode sheet, the negative electrode sheet, and the separator. The traction rollers are used to guide the direction of entering and exiting each device to ensure smooth conveying.

[0035] The production process of the folding high-speed cutting and stacking machine is as follows: Unwinding process: the positive electrode sheet coil, the negative electrode sheet coil and the separator coils on the upper and lower sides are unwound to form the positive electrode sheet, the negative electrode sheet and the separators on the upper and lower sides; Negative electrode sealing process: the negative electrode sheet is peeled to form negative electrode sheet I, and negative electrode sheet I is heat-sealed in the separators on the upper and lower sides; Peeling process: The positive electrode sheet is peeled to form positive electrode sheet I, and the negative electrode sheet I heat-sealed in the separator is separated by heat cutting to form negative electrode sheet II; Stacking process: positive electrode sheets I and negative electrode sheets II are transported alternately and stacked to form a preliminary battery cell; Gluing process: glue the preliminary battery cells to form finished battery cells.

[0036] Here’s how it works: A controller is installed inside the cabinet 1, and a control panel is installed outside the cabinet 1. Human-computer interaction can be performed through the electrically connected controller and control panel.

[0037] During operation: the positive electrode sheet unwinding assembly 21 unwinds the positive electrode sheet from the positive electrode sheet coil, and the positive electrode sheet is guided by the traction roller and then cleaned by the dust sweeping box 10 in turn; the tension control mechanism 5, the fine-tuning corrector 3 and the defect detection mechanism 4 perform corrective conveying; the positive electrode peeling assembly 71 peels, and the formed positive electrode sheet I falls on the vacuum belt conveyor 81 and is adsorbed.

[0038] The negative electrode sheet unwinding assembly 22 unwinds the negative electrode sheet from the negative electrode sheet coil, and the negative electrode sheet is guided by the traction roller and then cleaned by the dust box 10 in turn; the tension control mechanism 5, the defect detection mechanism 4 and the fine-tuning corrector 3 perform the corrective conveying; the negative electrode rotary cutting roller in the diaphragm heat sealing mechanism 62 rotary cuts the negative electrode sheet I.

[0039] At the same time, the two diaphragm unwinding components 61 can release the diaphragm on the diaphragm coil. After being guided by the traction roller, the diaphragm enters the diaphragm heat sealing mechanism 62 from the upper and lower sides. The diaphragms on both sides are located on the upper and lower sides of the negative electrode sheet I and are heated by the heat sealing rollers in the diaphragm heat sealing mechanism 62 to complete the isolation and sealing of the negative electrode sheet I. Compared with the existing Z-shaped stacking process, the isolation quality of the diaphragm can be improved; then it is transported into the negative electrode hot cutting component 72 and cut by the hot cutting roller. The formed negative electrode sheet II falls on the vacuum belt conveyor 81 and is adsorbed.

[0040] The positive electrode sheets I and the negative electrode sheets II are alternately transported to the detection and storage platform 82 for short-circuit detection and stacked for storage. When the number of falling sheets detected by the photoelectric gate component reaches the set value, this stack of positive electrode sheets I and negative electrode sheets II forms a preliminary battery cell, which is clamped and taken out by the sealing machine in the rotary gluing assembly 9, and is completely sealed after rotary gluing to form a finished battery cell.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-speed stacking and cutting machine, comprising a cabinet (1), characterized in that: The cabinet (1) is internally installed with: An unwinding mechanism (2), the unwinding mechanism (2) being located on both sides of the cabinet (1), and the unwinding mechanism (2) being used to respectively unwind the positive electrode sheet coil and the negative electrode sheet coil; A negative electrode film sealing mechanism (6), the negative electrode film sealing mechanism (6) being located inside the cabinet (1) on one side close to the negative electrode sheet coil, the negative electrode film sealing mechanism (6) being used to peel the negative electrode sheet and form a negative electrode sheet I, and then heat-seal the negative electrode sheet I with separators on both sides; A rotary cutting mechanism (7), the rotary cutting mechanism (7) being located in the middle of the cabinet (1), and being used for rotary cutting the positive electrode sheet to form the positive electrode sheet I, and for hot cutting the diaphragm to form the negative electrode sheet II; A laminating mechanism (8), the laminating mechanism (8) being located below the rotary cutting mechanism (7), and the laminating mechanism (8) being used for alternately conveying and stacking the positive electrode sheets I and the negative electrode sheets II; A rotating glue sticking assembly (9), the rotating glue sticking assembly (9) is located below the stacking mechanism (8), and the rotating glue sticking assembly (9) is used to perform glue sealing on the stacked positive electrode sheet I and negative electrode sheet II.

2. The folding high-speed cutting and folding machine according to claim 1, characterized in that: The unwinding mechanism (2) comprises a positive electrode sheet unwinding assembly (21) and a negative electrode sheet unwinding assembly (22) installed inside the cabinet (1); the positive electrode sheet unwinding assembly (21) is located on the left side inside the cabinet (1), and the negative electrode sheet unwinding assembly (22) is located on the right side inside the cabinet (1); the positive electrode sheet unwinding assembly (21) is used to unwind a positive electrode sheet coil, and the negative electrode sheet unwinding assembly (22) is used to unwind a negative electrode sheet coil; a tension control mechanism (5), a defect detection mechanism (4) and a fine-tuning deflection corrector (3) are provided in the direction in which the positive electrode sheet and the negative electrode sheet are conveyed toward the middle; the defect detection mechanism (4), the fine-tuning deflection corrector (3) and the tension control mechanism (5) are used to correct side errors of the positive electrode sheet and the negative electrode sheet occurring during conveying, thereby ensuring accurate conveying.

3. The folding high-speed cutting and folding machine according to claim 2, characterized in that: The negative electrode film sealing mechanism (6) comprises a diaphragm unwinding assembly (61) and a diaphragm heat-sealing mechanism (62) installed inside the cabinet (1). The diaphragm heat-sealing mechanism (62) is located on the right side inside the cabinet (1). There are two diaphragm unwinding assemblies (61) and they are distributed on the upper and lower sides of the diaphragm heat-sealing mechanism (62). The diaphragm unwinding assembly (61) is used to unwind a diaphragm coil. The diaphragms and negative electrode sheets transported by the diaphragm unwinding assemblies (61) on both sides can enter the diaphragm heat-sealing mechanism (62) at the same time. The diaphragm heat-sealing mechanism (62) is used to firstly rotary-cut the negative electrode sheet into negative electrode sheet I, and then heat-seal the negative electrode sheet I between the diaphragms on the upper and lower sides.

4. The folding high-speed cutting and folding machine according to claim 3, characterized in that: The separator heat sealing mechanism (62) comprises a heat sealing roller and a negative electrode rotary cutting roller, wherein the negative electrode rotary cutting roller is used to complete the rotary cutting of the negative electrode tabs, positioning holes, R angles and cutting during the conveyance of the negative electrode sheet, while the heat sealing roller is used to heat the separators on both sides.

5. The folding high-speed cutting and folding machine according to claim 3, characterized in that: The rotary cutting mechanism (7) comprises a positive electrode rotary cutting assembly (71) and a negative electrode hot cutting assembly (72); the positive electrode rotary cutting assembly (71) is located on the left side of the negative electrode hot cutting assembly (72); the positive electrode rotary cutting assembly (71) is used to rotary cut the positive electrode sheet to form a positive electrode sheet I; the negative electrode hot cutting assembly (72) is used to rotary hot cut the diaphragm coated on the negative electrode sheet I to form a negative electrode sheet II.

6. The folding high-speed cutting and folding machine according to claim 5, characterized in that: The positive electrode rotary cutting assembly (71) comprises a positive electrode rotary cutting roller, which is used to complete the rotary cutting of the positive electrode tabs, positioning holes, R angles and cutting of the positive electrode sheets during the conveyance of the positive electrode sheets; the negative electrode hot cutting assembly (72) comprises a hot cutting roller, which is used to cut the separator.

7. The folding high-speed cutting and folding machine according to claim 5, characterized in that: The stacking mechanism (8) comprises a vacuum belt conveyor (81) and a detection and storage platform (82), wherein the detection and storage platform (82) is located below the vacuum belt conveyor (81), and the vacuum belt conveyor (81) is used to convey the positive electrode sheets I and the negative electrode sheets II that are alternately arranged on the upper side, and to alternately stack the positive electrode sheets I and the negative electrode sheets II on the detection and storage platform (82) on the lower side.

8. The folding high-speed cutting and folding machine according to claim 7, characterized in that: The rotating glue sticking assembly (9) comprises a glue sealing machine, which is used to perform glue sealing on the positive electrode sheets I and negative electrode sheets II that have reached a certain number in the detection storage platform to form a battery core.

9. The folding high-speed cutting and folding machine according to claim 1, characterized in that: A dust sweeping box (10) is installed inside the cabinet (1), and the dust sweeping box (10) is located above the positive electrode sheet unwinding assembly (21) and the negative electrode sheet unwinding assembly (22), respectively. The dust sweeping box (10) is used to absorb debris on the positive electrode sheet and the negative electrode sheet.

10. The production process of a rotating high-speed cutting and stacking machine is characterized by: include Unwinding process: the positive electrode sheet coil, the negative electrode sheet coil and the separator coils on the upper and lower sides are unwound to form the positive electrode sheet, the negative electrode sheet and the separators on the upper and lower sides; Negative electrode sealing process: the negative electrode sheet is peeled to form negative electrode sheet I, and negative electrode sheet I is heat-sealed in the separators on the upper and lower sides; Peeling process: The positive electrode sheet is peeled to form positive electrode sheet I, and the negative electrode sheet I heat-sealed in the separator is separated by heat cutting to form negative electrode sheet II; Stacking process: positive electrode sheets I and negative electrode sheets II are transported alternately and stacked to form a preliminary battery cell; Gluing process: glue the preliminary battery cells to completely seal them and form the finished battery cells.

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